About This Calculator

This guide provides clinical context for the Otezla (apremilast) dose calculator. The tool is designed to generate the standard 5-day initial oral titration schedule required to reach the maintenance dose, with specific adjustments for patients with severe renal impairment.

Outputs Explained

The calculator provides a clear, day-by-day dosing table for the first five days of therapy. Each result includes:

• Daily Dosing: The specific milligram (mg) dose for the morning (AM) and/or evening (PM).
• Dates: The corresponding calendar date for each day of the titration schedule.
• Dosing Regimen: A label indicating whether the schedule is 'Standard Dosing' or for 'Severe Renal Impairment'.
• Maintenance Dose: The final target dose to be continued from Day 6 onwards.

How to Use This Tool

1. Set the Start Date: Use the date picker to select the day the patient will take their first dose of Otezla.
2. Specify Renal Function: Check the box only if the patient has severe renal impairment, defined as a creatinine clearance (CrCl) of less than 30 mL/min. Leave it unchecked for all other patients.
3. Review the Schedule: The dosing table automatically updates to show the correct 5-day titration based on your inputs.

Dosing Overview

Apremilast requires a gradual dose titration to improve gastrointestinal tolerability. The specific schedule depends on the patient's renal function.

Standard Titration

Patients start with 10 mg once daily in the morning and increase the dose over 5 days to reach the target maintenance dose of 30 mg twice daily.

Severe Renal Impairment (CrCl < 30 mL/min)

The titration and maintenance doses are modified. Patients take only the morning doses during the 5-day titration period. The target maintenance dose is reduced to 30 mg once daily in the morning.

Switching and Co-administration

The co-administration of Otezla with strong CYP450 inducers (e.g., rifampin, phenobarbital, carbamazepine, phenytoin) is not recommended. This can lead to a significant reduction in apremilast exposure and a potential loss of efficacy. Always review the patient's current medications for potential drug interactions before initiating therapy.

Missed Dose Protocol

According to the prescribing information, if a patient misses a dose, they should take it as soon as they remember. However, if it is close to the time of their next scheduled dose, they should skip the missed dose and resume their normal schedule. Patients should not take two doses at once to make up for a missed dose.

Safety Alerts

Otezla is contraindicated in patients with a known hypersensitivity to apremilast or any of its excipients. Key safety warnings from the official label include:

• Depression: An increase in adverse reactions of depression, suicidal ideation, and suicidal behavior has been observed. Carefully weigh the risks and benefits for patients with a history of depression or suicidality.
• Weight Loss: Regular monitoring of body weight is recommended. Unexplained or clinically significant weight loss should be evaluated by the prescriber.
• Gastrointestinal Distress: Diarrhea, nausea, and vomiting are common adverse reactions, particularly during the first few weeks of treatment.

Frequently Asked Questions

What is the purpose of the Otezla dose titration?

The gradual increase in dose over the first 5 days is designed to help improve the gastrointestinal tolerability of the medication, reducing the incidence of nausea and diarrhea.

How does severe renal impairment affect the Otezla starting dose?

In patients with severe renal impairment, apremilast clearance is reduced. The dosing schedule is adjusted to only include morning (AM) doses during titration, and the final maintenance dose is halved to 30 mg once daily.

What is the CrCl cutoff for the renal dosing adjustment?

The calculator applies the dose adjustment for patients with a creatinine clearance (CrCl) of less than 30 mL/min, which is consistent with the official prescribing information for severe renal impairment.

What happens on Day 6 of Otezla therapy?

Day 6 is the first day of the maintenance dose. Patients with normal renal function will take 30 mg twice daily, while those with severe renal impairment will take 30 mg once daily in the morning.

Does this calculator account for moderate renal impairment?

No, a dose adjustment is not required for patients with mild or moderate renal impairment. This calculator only modifies the dose for severe impairment (CrCl < 30 mL/min).

Can I start Otezla without the titration starter pack?

The titration should always be followed, whether using a starter pack or prescribing individual tablet strengths. This tool helps create the schedule regardless of how the medication is supplied.

Why is the PM dose omitted in the renal impairment schedule?

The total daily dose is reduced in patients with severe renal impairment to account for decreased drug clearance. The titration schedule reflects this by omitting all evening doses, leading to a once-daily maintenance therapy.

Does this tool calculate doses for pediatric patients?

No. The safety and effectiveness of Otezla in pediatric patients have not been established. This tool is intended for adult dosing schedules only.

References

This information is based on established clinical guidelines and official prescribing information. For complete details, consult the primary sources.

1. OTEZLA® (apremilast) tablets - Official FDA Prescribing Information
2. Drugs@FDA: Otezla (apremilast) Approval Information
3. Amgen Medical: Otezla (apremilast) HCP Website
4. EMA: Otezla (apremilast) Summary of Product Characteristics